What you write is mostly correct except that you can't really 'jump on' for curation rewards. Those rewards go to the first to vote for the past, late arrivals get little or nothing.
I agree Dan's antics are highly unprofessional and destructive (and to some extent Ned too, who seems to have jumped into this whale pissing contest somehow, though I don't know all the details). I was not terribly disappointed to see him leave Steem, although I do have some respect for his technical abilities. Untrustworthy and socially-inept people can still be good programmers, it isn't even necessarily that uncommon a combination. Anyway, what would crypto be without drama?